Precise determination of seawater calcium using isotope dilution inductively coupled plasma mass spectrometry

CORC > 厦门大学 > 海洋环境－已发表论文

	Precise determination of seawater calcium using isotope dilution inductively coupled plasma mass spectrometry
	Liu, Hou-Chun ; You, Chen-Feng ; Cai, Wei-Jun ; Chung, Chuan-Hsiung ; Huang, Kuo-Fang ; Chen, Bao-Shan ; Li, Yen ; Li Y(李炎)
刊名	http://dx.doi.org/10.1039/c3an01948a
	2014
关键词	CARBON-CYCLE COMPLEXOMETRIC TITRATION OCEAN ACIDIFICATION SYSTEM CO2 FEEDBACKS MAGNESIUM PACIFIC DIOXIDE
英文摘要	NSC, Taiwan; We describe a method for rapid, precise and accurate determination of calcium ion (Ca2+) concentration in seawater using isotope dilution inductively coupled plasma mass spectrometry (ID-ICP-MS). A 10 mu L aliquot of seawater was spiked with an appropriate Ca-43 enriched solution for Ca-44/Ca-43 ID-ICP-MS analyses, using an Element XR (Thermo Fisher Scientific), operated at low resolution in E-scan acquisition mode. A standard-sample bracketing technique was applied to correct for potential mass discrimination and ratio drift at every 5 samples. A precision of better than 0.05% for within-run and 0.10% for duplicate measurements of the IAPSO seawater standard was achieved using 10 mu L solutions with a measuring time less than 3 minutes. Depth profiles of seawater samples collected from the Arctic Ocean basin were processed and compared with results obtained by the classic ethylene glycol tetra-acetic acid (EGTA) titration. Our new ID-ICP-MS data agreed closely with the conventional EGTA data, with the latter consistently displaying 1.5% excess Ca2+ values, possibly due to a contribution of interference from Mg2+ and Sr2+ in the EGTA titration. The newly obtained Sr/Ca profiles reveal sensitive water mass mixing in the upper oceanic column to reflect ice melting in the Arctic region. This novel technique provides a tool for seawater Ca2+ determination with small sample size, high throughput, excellent internal precision and external reproducibility.
语种	英语
出版者	ROYAL SOC CHEMISTRY
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/88204]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Liu, Hou-Chun,You, Chen-Feng,Cai, Wei-Jun,et al. Precise determination of seawater calcium using isotope dilution inductively coupled plasma mass spectrometry[J]. http://dx.doi.org/10.1039/c3an01948a,2014.
APA	Liu, Hou-Chun.,You, Chen-Feng.,Cai, Wei-Jun.,Chung, Chuan-Hsiung.,Huang, Kuo-Fang.,...&李炎.(2014).Precise determination of seawater calcium using isotope dilution inductively coupled plasma mass spectrometry.http://dx.doi.org/10.1039/c3an01948a.
MLA	Liu, Hou-Chun,et al."Precise determination of seawater calcium using isotope dilution inductively coupled plasma mass spectrometry".http://dx.doi.org/10.1039/c3an01948a (2014).